TWI648144B - Mold device with exhaust structure - Google Patents

Abstract

A mold apparatus having an exhaust structure including a first mold and a second mold. The first mold includes a first curved surface that is non-planar, a first molding portion formed on the first curved surface, and a first stepped surface surrounding the first molding portion. The second mold includes a second curved surface that is non-planar and opposes the first curved surface, a second curved portion formed on the second curved surface and defining a cavity with the opposing first molded portion, And a second step surface surrounding the second molding portion. The second step surface and the opposite first step surface define an exhaust passage communicating with the cavity and the outside. Thereby, the difference between the curved surface and the step surface is formed, and an exhaust passage for gas flow is formed without additional groove or hole processing, which not only simplifies the process and components, but also reduces the processing. And component cost, and can improve the airtight effect.

Description

Mold device with exhaust structure

The present invention relates to a mold apparatus, and more particularly to a mold apparatus having an exhaust structure.

Referring to FIG. 1, a conventional shoe mold structure 1 disclosed in the Patent No. M309500 of the Republic of China is taken as an example, and mainly includes an upper mold 11, which is opposed to the upper mold 11 and defined with the upper mold 11 A lower die 13 of a cavity 12, and a hermetic member 14. The upper mold 11 includes a mating plane 111 and a stepped surface 112 formed on the mating plane 111. The lower die 13 includes a mating plane 131 that is opposite to the mating plane 111, and a stepped surface 133 formed on the mating plane 131 and defining a loop groove 132 with the stepped surface 112, and The annular groove 132 is connected to an exhaust pipe 134 of the outside. The ring groove 132 communicates with the cavity 12. The airtight member 14 is disposed between the mating plane 111 and the mating plane 131. Thereby, the gas displaced in the cavity 12 is discharged from the ring groove 132 through the exhaust pipe 134 during the foam molding.

However, the exhaust pipe 134 of the general exhaust gas is formed either internally or formed on the mating plane 131 (111), and is formed after the lower die 13 or the upper die 11 is formed, and then processed twice. Not only the processing procedure is cumbersome, but also the cost is high.

In addition, since the mating plane 131 and the mating plane 111 are aligned, it is necessary to maintain the airtight effect, and the processing precision and the processing cost are greatly improved. Therefore, as shown in the drawing, the airtight member is adopted in the patent No. M309500. The airtight effect is achieved by 14, but the airtight member 14 is easily deteriorated during heating and pressurization, which not only increases the number of components, but also increases the cost of replacement.

Accordingly, it is an object of the present invention to provide a mold apparatus having an exhaust structure capable of simplifying processes and components, reducing processing and assembly costs, and capable of improving airtightness.

Thus, the present invention has a mold structure for a venting structure comprising a first mold and a second mold.

The first mold includes a first curved surface that is not planar, a first molding portion formed on the first curved surface, and a first stepped surface surrounding the first molding portion, the first step surface along the first a height direction of a mold is formed with a difference in the first curved surface; and

The second mold includes a second curved surface that is non-planar and opposes the first curved surface, a second curved portion formed on the second curved surface and defining a cavity with the opposing first molded portion, And a second step surface surrounding the second merging portion and forming a difference with the second curved surface along the height direction, the second step surface and the opposite first step surface defining a communication between the cavity and the outside And an exhaust passage for the gas to flow.

The effect of the invention is that, by the difference formed between the curved surface and the step surface, an exhaust passage for gas flow can be formed without additional groove or hole processing, which can simplify the process and the assembly. Reduce processing and component costs and improve air tightness.

Referring to Figures 2 and 3, an embodiment of a mold apparatus having an exhaust structure of the present invention is used for foam molding a sole. The mold device comprises a first mold 2 and a second mold 3.

The first mold 2 includes a first curved surface 21 that is not planar, two first molding portions 22 formed on the first curved surface 21, and two first step surfaces 23 that are protruded from the first curved surface 21. It should be noted that the first molding portion 22 and the first step surface 23 may be one.

In this embodiment, the first curved surface 21 undulates along a length direction Y of the first mold 2, and has two gas permeable regions 211 adjacent to the two ends and spaced apart from each other, and the gas permeable regions 211 along the first Three airtight regions 212 of a mold 2 are arranged in a width direction X.

Each of the first step faces 23 surrounds the respective first dies 22 and is formed with a difference in the height direction Z of the first die 2 from the first curved surface 21 and has a first curved surface 21 adjacent thereto. A wall portion 231 and a side wall portion 232 adjacent to the first molding portion 22.

The second mold 3 includes a second curved surface 31 that is non-planar and opposes the first curved surface 21, two second molding portions 32 formed on the second curved surface 31, and the second along the height direction Z. Two second step faces 33 of the two curved surfaces 31 are recessed. It should be noted that the second molding portion 32 and the second step surface 33 may be one.

Referring to FIG. 4, FIG. 5 and FIG. 6, in the embodiment, the second curved surface 31 undulates along the longitudinal direction Y and cooperates with the first curved surface 21, and has two ventilating regions adjacent to the two ends and separated by a spacing. 311, and three airtight regions 312 arranged along the width direction X of the gas permeable regions 311. Each venting zone 311 is adapted to define an air gap 310 that communicates with the outside and forms a gas flow path, and each airtight zone 312 is used to contact the respective corresponding airtight zone 212. And block the gas flow path.

Each second step surface 33 surrounds each of the second molding portions 32, and a difference is formed along the height direction Z and the second curved surface 31, and is defined for the first step surface 23 opposite to each other. An exhaust passage 330 communicating with the cavity 30 and the air gap 310 for supplying a gas, and having a side wall portion 331 adjacent to the second curved surface 31, and a side adjacent to the second molding portion 32 Wall portion 332.

When the first mold 2 is aligned with the second mold 3 along the height direction Z, the airtight region 212 of the first curved surface 21 of the first mold 2 and the airtight region 312 of the second mold 3 opposite to each other. The gas-tight contact blocks the flow of the gas so that the gas flows along the air gap 310 between the gas permeable regions 211 of the first mold 2 and the gas permeable regions 311 of the second mold 3.

Thereby, during the foam molding process, the exhausted gas in the cavity 30 first overflows to the exhaust passage 330 communicating with the cavity 30, and then the exhaust end of the exhaust passage 330 passes through the The air gap 310 is discharged to the outside.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. The present invention is a difference formed between the first curved surface 21, the second curved surface 31, and the first step surface 23 and the second step surface 33, without requiring additional trench or hole processing. Forming the exhaust passage 330 and the air gap 310 for gas flow can not only simplify the process and components, but also reduce the processing cost.

2. In the present invention, the airtight regions 212 and 312 are formed through the cooperation of the curvature of the first curved surface 21 and the second curved surface 31, and have a larger airtight area than the flat surface, and a more suitable contact effect. Therefore, there is no need to install additional airtight parts, which not only simplifies the components, but also enhances the airtightness.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 2········ The first mold 21······· Curved surface 211····· Breathable area 212····· Airtight area 22······ First mold part 23······ First step surface 231····· Wall part 232····· Side wall part 3········ Second mold 30······ Mould 31······ Second surface </td><td> 310·· ··· Air gap 311····· Ventilation area 312····· Airtight area 32······ Second mold part 33······ Second step surface 330···· · Exhaust duct 331····· Side wall part 332····· Wall part X ······ Width direction Y ······· Length direction Z ······· Height Direction</td></tr></TBODY></TABLE>

Other features and advantages of the present invention will be apparent from the description of the embodiments of the invention, wherein: Figure 1 is a cross-sectional view showing a conventional shoe mold disclosed in the Patent No. M309500 of the Republic of China. Figure 2 is an exploded perspective view showing an embodiment of a mold apparatus having an exhaust structure of the present invention; Figure 3 is a cross-sectional exploded view of the embodiment; Figure 4 is a combined view of the embodiment Fig. 5 is a cross-sectional view taken along line V-V in Fig. 4; and Fig. 6 is a partial enlarged view of Fig. 5.

Claims (6)

A mold apparatus having an exhaust structure, comprising: a first mold, including a first curved surface having a non-planar and undulating configuration, a first molding portion formed on the first curved surface, and surrounding the first mold a first step surface of the portion, the first step surface forming a difference from the first curved surface along a height direction of the first mold; and a second mold comprising a non-planar and undulating structure and the first step a second curved surface of the curved surface, a second molding portion formed on the second curved surface and defining a cavity with the opposite first molding portion, and surrounding the second molding portion along the height The direction forms a second step surface with the second curved surface with a difference, and the second step surface and the opposite first step surface define an exhaust passage communicating with the cavity and the outside for supplying gas. The mold apparatus having an exhaust structure according to claim 1, wherein the first curved surface undulates along a length direction of the first mold, and the second curved surface is formed with the second curved surface along the longitudinal direction. a curvature. A mold apparatus having an exhaust structure according to claim 1, wherein the first curved surface has one or more gas permeable regions, and one or more airtight regions, the second curved surface has one or more gas permeable regions, and one or more The airtight region of the second curved surface is configured to define, with the venting region of the first curved surface, an air gap that communicates with the exhaust passage and the outside to form a gas flow path, and the airtight region of the second curved surface Used to contact the airtight region of the first curved surface and block the gas flow path. A mold apparatus having an exhaust structure according to claim 1, wherein the first A step surface protrudes from the first curved surface, and the second step surface is recessed by the second curved surface. A mold apparatus having an exhaust structure according to claim 4, wherein the first step surface has a wall portion adjacent to the first curved surface, and a side wall portion adjacent to the first mold portion. A mold apparatus having an exhaust structure according to claim 4, wherein the second step surface has a side wall portion adjacent to the second curved surface, and a wall portion adjacent to the second mold portion.